diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e4ee8b28b..bc202e4ac 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -30,7 +30,7 @@ if(WIN32)
 FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/test_helper.ps1
 "if (Test-Path $args[2]) { Remove-Item -Force $args[2] } \n"
 "$ErrorActionPreference = \"Stop\"\n"
-"Get-Content $args[1] | & $args[0]\n"
+"Get-Content $args[1] -encoding ASCII | & $args[0]\n"
 "If ((Get-Content $args[2] | %{$_ -match \"FATAL\"}) -contains $true) {\n"
 "echo Error\n"
 "exit 1\n"